At what rate per annum will N250 amount to N330 in 4 years.

Step-by-step explanation:

Given,

Principal ( P ) = N 250

Time ( T ) = 4 years

Amount ( A ) =N 330

Rate ( R ) = ?

First, finding the Interest :

According to definition of Amount ,

Amount = Principal + Interest

plug the values

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Move i to left hand side and change it's sign

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Calculate

⇒

Change the signs of the both equation

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Interest = 80

Finding the rate :

Simple Interest =

plug the values

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Multiply the numbers

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Apply cross product property

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Multiply the numbers

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Divide both sides of the equation by 1000

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Calculate

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Thus, Rate = 8 %

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Let's learn about Principal , Interest , Time , Rate and Amount :

Hope I helped!

Best regards!!

i did it myself and i got 4.2 (b) hope its right

step-by-step explanation:

answer

d. 10

explanation

the distance from point y to wx is the height of the triangle.

using pythagoras theorem,

group similar terms to get,

this implies that,

take positive square root of both sides to get,

this implies that,